Define a function or symbol

Define a function f:

Find the definition of a function or symbol

Find the definition of f:

• You can also use Definition to get a symbol or a function’s definition.

Clear the definition of a function or symbol

Clear the definition of f:

The function f is no longer defined:

Notes

If you redefine a function, using Clear beforehand will ensure that no unwanted definitions linger and cause potential problems.

Symbols whose values are assigned with Set (e.g. ) can be cleared with Unset (e.g. ).

Clear clears definitions, but not attributes, messages or defaults associated with symbols. Use ClearAll to clear all information associated with a symbol.

Clear and ClearAll leave the cleared symbol intact. Use Remove to remove the symbol completely:

The symbol x persists after Clear:

Remove the symbol completely: